I actually do know the identity of the man, I purchased a large lot from an auction house in the Albany, NY area a few months back. The man had passed away, and there were no living relatives to claim any of his belongings, so the books went to auction and then to me.

I'd love to help you link photos such as these on Ancestry. While he may not have any living relatives, he may have some more distant ones who would love to add these to their family tree. Feel free to contact me if you're interested.